Video Experimental Relacionado
Updated: Jun 8, 2025
06:53
Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
6.8K
Observación de vórtices en un supersólido dipolar
Eva Casotti1,2, Elena Poli2, Lauritz Klaus1,2
1Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Innsbruck, Austria.
Nature
|November 7, 2024
Resumen
Los investigadores observaron vórtices cuantificados en gases cuánticos supersólidos por primera vez. Este avance permite el estudio de sistemas cuánticos exóticos con múltiples simetrías rotas, impactando campos desde cristales cuánticos hasta estrellas de neutrones.
Área de la Ciencia:
- La física cuántica
- Física de la materia condensada
Sus antecedentes:
- Los supersólidos rompen las simetrías de traslación y fase, exhibiendo orden cristalino y superfluidez.
- Las investigaciones anteriores se centraron en el helio sólido y los gases cuánticos dipolares ultrafríos, observando la coherencia de fase pero no los vórtices cuantificados.
Objetivo del estudio:
- Investigar teóricamente y observar experimentalmente los vórtices cuantificados en la fase supersólida (SSP).
- Para explorar la dinámica de siembra del vórtice en fluidos cuánticos modulados.
Principales métodos:
- Utilizó un método para generar vórtices en gases cuánticos dipolares.
- Se crearon supersólidos con orden cristalino bidimensional.
- Realizó investigaciones teóricas y observaciones experimentales.
Principales resultados:
- Se han observado con éxito vórtices cuantificados en la fase supersólida (SSP).
- Reveló distintas dinámicas de siembra de vórtice entre fluidos cuánticos no modulados y modulados.
Conclusiones:
- La observación de vórtices en supersólidos proporciona una nueva plataforma para el estudio de la hidrodinámica cuántica.
- Este trabajo abre vías para explorar sistemas cuánticos exóticos con múltiples simetrías rotas.
Videos de Conceptos Relacionados
01:29Potential Due to a Polarized Object
367
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
367
02:54Molecular and Ionic Solids
16.9K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.9K
01:28Induced Electric Dipoles
4.2K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.2K
02:39Phase Transitions: Vaporization and Condensation
17.4K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
17.4K
01:30Electric Dipoles and Dipole Moment
5.0K
Consider two charges of equal magnitude but opposite signs. If they cannot be separated by an external electric field, the system is called a permanent dipole. For example, the water molecule is a dipole, making it a good solvent.
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
5.0K
01:28Magnetostatic Boundary Conditions
877
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
877